Find All Complex Solutions (c-4)/(c-2)=(c-2)/(c+2)-1/(2-c)

$\frac{c - 4}{c - 2} = \frac{c - 2}{c + 2} - \frac{1}{2 - c}$

Find the LCD of the terms in the equation.

Finding the LCD of a list of values is the same as finding the LCM of the denominators of those values.

$c - 2, c + 2, 2 - c$

The LCM is the smallest positive number that all of the numbers divide into evenly.

1. List the prime factors of each number.

2. Multiply each factor the greatest number of times it occurs in either number.

The number $1$ is not a prime number because it only has one positive factor, which is itself.

Not prime

The LCM of $1, 1, 1$ is the result of multiplying all prime factors the greatest number of times they occur in either number.

$1$

The factor for $c - 2$ is $c - 2$ itself.

$(c - 2) = c - 2$

$(c - 2)$ occurs $1$ time.

The factor for $c + 2$ is $c + 2$ itself.

$(c + 2) = c + 2$

$(c + 2)$ occurs $1$ time.

The factor for $2 - c$ is $2 - c$ itself.

$(2 - c) = 2 - c$

$(2 - c)$ occurs $1$ time.

The LCM of $c - 2, c + 2, 2 - c$ is the result of multiplying all factors the greatest number of times they occur in either term.

$(c - 2) (c + 2) (2 - c)$

Multiply each term in $\frac{c - 4}{c - 2} = \frac{c - 2}{c + 2} - \frac{1}{2 - c}$ by $(c - 2) (c + 2) (2 - c)$ to eliminate the fractions.

Multiply each term in $\frac{c - 4}{c - 2} = \frac{c - 2}{c + 2} - \frac{1}{2 - c}$ by $(c - 2) (c + 2) (2 - c)$ .

$\frac{c - 4}{c - 2} ((c - 2) (c + 2) (2 - c)) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Simplify the left side.

Cancel the common factor of $c - 2$ .

Factor $c - 2$ out of $(c - 2) (c + 2) (2 - c)$ .

$\frac{c - 4}{c - 2} ((c - 2) ((c + 2) (2 - c))) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Cancel the common factor.

$\frac{c - 4}{c - 2} ((c - 2) ((c + 2) (2 - c))) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Rewrite the expression.

$(c - 4) ((c + 2) (2 - c)) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Expand $(c + 2) (2 - c)$ using the FOIL Method.

Apply the distributive property.

$(c - 4) (c (2 - c) + 2 (2 - c)) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Apply the distributive property.

$(c - 4) (c \cdot 2 + c (- c) + 2 (2 - c)) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Apply the distributive property.

$(c - 4) (c \cdot 2 + c (- c) + 2 \cdot 2 + 2 (- c)) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Simplify and combine like terms.

Simplify each term.

Move $2$ to the left of $c$ .

$(c - 4) (2 \cdot c + c (- c) + 2 \cdot 2 + 2 (- c)) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Rewrite using the commutative property of multiplication.

$(c - 4) (2 c - c \cdot c + 2 \cdot 2 + 2 (- c)) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Multiply $c$ by $c$ by adding the exponents.

Move $c$ .

$(c - 4) (2 c - (c \cdot c) + 2 \cdot 2 + 2 (- c)) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Multiply $c$ by $c$ .

$(c - 4) (2 c - c^{2} + 2 \cdot 2 + 2 (- c)) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Multiply $2$ by $2$ .

$(c - 4) (2 c - c^{2} + 4 + 2 (- c)) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Multiply $- 1$ by $2$ .

$(c - 4) (2 c - c^{2} + 4 - 2 c) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Subtract $2 c$ from $2 c$ .

$(c - 4) (- c^{2} + 4 + 0) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Add $- c^{2}$ and $0$ .

$(c - 4) (- c^{2} + 4) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Expand $(c - 4) (- c^{2} + 4)$ using the FOIL Method.

Apply the distributive property.

$c (- c^{2} + 4) - 4 (- c^{2} + 4) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Apply the distributive property.

$c (- c^{2}) + c \cdot 4 - 4 (- c^{2} + 4) = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Apply the distributive property.

$c (- c^{2}) + c \cdot 4 - 4 (- c^{2}) - 4 \cdot 4 = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Simplify each term.

Rewrite using the commutative property of multiplication.

$- c \cdot c^{2} + c \cdot 4 - 4 (- c^{2}) - 4 \cdot 4 = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Multiply $c$ by $c^{2}$ by adding the exponents.

Move $c^{2}$ .

$- (c^{2} c) + c \cdot 4 - 4 (- c^{2}) - 4 \cdot 4 = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Multiply $c^{2}$ by $c$ .

Raise $c$ to the power of $1$ .

$- (c^{2} c^{1}) + c \cdot 4 - 4 (- c^{2}) - 4 \cdot 4 = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$- c^{2 + 1} + c \cdot 4 - 4 (- c^{2}) - 4 \cdot 4 = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Add $2$ and $1$ .

$- c^{3} + c \cdot 4 - 4 (- c^{2}) - 4 \cdot 4 = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Move $4$ to the left of $c$ .

$- c^{3} + 4 \cdot c - 4 (- c^{2}) - 4 \cdot 4 = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Multiply $- 1$ by $- 4$ .

$- c^{3} + 4 c + 4 c^{2} - 4 \cdot 4 = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Multiply $- 4$ by $4$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = \frac{c - 2}{c + 2} ((c - 2) (c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Simplify the right side.

Simplify each term.

Cancel the common factor of $c + 2$ .

Factor $c + 2$ out of $(c - 2) (c + 2) (2 - c)$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = \frac{c - 2}{c + 2} ((c + 2) ((c - 2) (2 - c))) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Cancel the common factor.

$- c^{3} + 4 c + 4 c^{2} - 16 = \frac{c - 2}{c + 2} ((c + 2) ((c - 2) (2 - c))) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Rewrite the expression.

$- c^{3} + 4 c + 4 c^{2} - 16 = (c - 2) ((c - 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Factor $- 1$ out of $c$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = (c - 2) ((- 1 (- c) - 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Rewrite $- 2$ as $- 1 (2)$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = (c - 2) ((- 1 (- c) - 1 (2)) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Factor $- 1$ out of $- 1 (- c) - 1 (2)$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = (c - 2) (- 1 (- c + 2) (2 - c)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Reorder terms.

$- c^{3} + 4 c + 4 c^{2} - 16 = (c - 2) (- 1 (- c + 2) (- c + 2)) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Raise $- c + 2$ to the power of $1$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = (c - 2) (- 1 ({(- c + 2)}^{1} (- c + 2))) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Raise $- c + 2$ to the power of $1$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = (c - 2) (- 1 ({(- c + 2)}^{1} {(- c + 2)}^{1})) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$- c^{3} + 4 c + 4 c^{2} - 16 = (c - 2) (- 1 {(- c + 2)}^{1 + 1}) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Add $1$ and $1$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = (c - 2) (- 1 {(- c + 2)}^{2}) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Factor $- 1$ out of $c$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = (- 1 (- c) - 2) (- 1 {(- c + 2)}^{2}) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Rewrite $- 2$ as $- 1 (2)$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = (- 1 (- c) - 1 (2)) (- 1 {(- c + 2)}^{2}) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Factor $- 1$ out of $- 1 (- c) - 1 (2)$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = - 1 (- c + 2) (- 1 {(- c + 2)}^{2}) - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Multiply $- c + 2$ by ${(- c + 2)}^{2}$ by adding the exponents.

Move ${(- c + 2)}^{2}$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = - 1 ({(- c + 2)}^{2} (- c + 2)) \cdot - 1 - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Multiply ${(- c + 2)}^{2}$ by $- c + 2$ .

Raise $- c + 2$ to the power of $1$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = - 1 ({(- c + 2)}^{2} {(- c + 2)}^{1}) \cdot - 1 - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$- c^{3} + 4 c + 4 c^{2} - 16 = - 1 {(- c + 2)}^{2 + 1} \cdot - 1 - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Add $2$ and $1$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = - 1 {(- c + 2)}^{3} \cdot - 1 - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Multiply $- 1$ by $- 1$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = 1 {(- c + 2)}^{3} - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Multiply ${(- c + 2)}^{3}$ by $1$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c + 2)}^{3} - \frac{1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Cancel the common factor of $2 - c$ .

Move the leading negative in $- \frac{1}{2 - c}$ into the numerator.

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c + 2)}^{3} + \frac{- 1}{2 - c} ((c - 2) (c + 2) (2 - c))$

Factor $2 - c$ out of $(c - 2) (c + 2) (2 - c)$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c + 2)}^{3} + \frac{- 1}{2 - c} ((2 - c) ((c - 2) (c + 2)))$

Cancel the common factor.

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c + 2)}^{3} + \frac{- 1}{2 - c} ((2 - c) ((c - 2) (c + 2)))$

Rewrite the expression.

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c + 2)}^{3} - ((c - 2) (c + 2))$

Expand $(c - 2) (c + 2)$ using the FOIL Method.

Apply the distributive property.

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c + 2)}^{3} - (c (c + 2) - 2 (c + 2))$

Apply the distributive property.

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c + 2)}^{3} - (c \cdot c + c \cdot 2 - 2 (c + 2))$

Apply the distributive property.

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c + 2)}^{3} - (c \cdot c + c \cdot 2 - 2 c - 2 \cdot 2)$

Combine the opposite terms in $c \cdot c + c \cdot 2 - 2 c - 2 \cdot 2$ .

Reorder the factors in the terms $c \cdot 2$ and $- 2 c$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c + 2)}^{3} - (c \cdot c + 2 c - 2 c - 2 \cdot 2)$

Subtract $2 c$ from $2 c$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c + 2)}^{3} - (c \cdot c + 0 - 2 \cdot 2)$

Add $c \cdot c$ and $0$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c + 2)}^{3} - (c \cdot c - 2 \cdot 2)$

Simplify each term.

Multiply $c$ by $c$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c + 2)}^{3} - (c^{2} - 2 \cdot 2)$

Multiply $- 2$ by $2$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c + 2)}^{3} - (c^{2} - 4)$

Apply the distributive property.

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c + 2)}^{3} - c^{2} - - 4$

Multiply $- 1$ by $- 4$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c + 2)}^{3} - c^{2} + 4$

Solve the equation.

Simplify ${(- c + 2)}^{3} - c^{2} + 4$ .

Simplify each term.

Use the Binomial Theorem.

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- c)}^{3} + 3 {(- c)}^{2} \cdot 2 + 3 (- c) \cdot 2^{2} + 2^{3} - c^{2} + 4$

Simplify each term.

Apply the product rule to $- c$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = {(- 1)}^{3} c^{3} + 3 {(- c)}^{2} \cdot 2 + 3 (- c) \cdot 2^{2} + 2^{3} - c^{2} + 4$

Raise $- 1$ to the power of $3$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = - c^{3} + 3 {(- c)}^{2} \cdot 2 + 3 (- c) \cdot 2^{2} + 2^{3} - c^{2} + 4$

Apply the product rule to $- c$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = - c^{3} + 3 ({(- 1)}^{2} c^{2}) \cdot 2 + 3 (- c) \cdot 2^{2} + 2^{3} - c^{2} + 4$

Raise $- 1$ to the power of $2$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = - c^{3} + 3 (1 c^{2}) \cdot 2 + 3 (- c) \cdot 2^{2} + 2^{3} - c^{2} + 4$

Multiply $c^{2}$ by $1$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = - c^{3} + 3 c^{2} \cdot 2 + 3 (- c) \cdot 2^{2} + 2^{3} - c^{2} + 4$

Multiply $2$ by $3$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = - c^{3} + 6 c^{2} + 3 (- c) \cdot 2^{2} + 2^{3} - c^{2} + 4$

Multiply $- 1$ by $3$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = - c^{3} + 6 c^{2} - 3 c \cdot 2^{2} + 2^{3} - c^{2} + 4$

Raise $2$ to the power of $2$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = - c^{3} + 6 c^{2} - 3 c \cdot 4 + 2^{3} - c^{2} + 4$

Multiply $4$ by $- 3$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = - c^{3} + 6 c^{2} - 12 c + 2^{3} - c^{2} + 4$

Raise $2$ to the power of $3$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = - c^{3} + 6 c^{2} - 12 c + 8 - c^{2} + 4$

Simplify by adding terms.

Subtract $c^{2}$ from $6 c^{2}$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = - c^{3} + 5 c^{2} - 12 c + 8 + 4$

Add $8$ and $4$ .

$- c^{3} + 4 c + 4 c^{2} - 16 = - c^{3} + 5 c^{2} - 12 c + 12$

Move all terms containing $c$ to the left side of the equation.

Add $c^{3}$ to both sides of the equation.

$- c^{3} + 4 c + 4 c^{2} - 16 + c^{3} = 5 c^{2} - 12 c + 12$

Subtract $5 c^{2}$ from both sides of the equation.

$- c^{3} + 4 c + 4 c^{2} - 16 + c^{3} - 5 c^{2} = - 12 c + 12$

Add $12 c$ to both sides of the equation.

$- c^{3} + 4 c + 4 c^{2} - 16 + c^{3} - 5 c^{2} + 12 c = 12$

Combine the opposite terms in $- c^{3} + 4 c + 4 c^{2} - 16 + c^{3} - 5 c^{2} + 12 c$ .

Add $- c^{3}$ and $c^{3}$ .

$4 c + 4 c^{2} - 16 + 0 - 5 c^{2} + 12 c = 12$

Add $4 c + 4 c^{2} - 16$ and $0$ .

$4 c + 4 c^{2} - 16 - 5 c^{2} + 12 c = 12$

Add $4 c$ and $12 c$ .

$4 c^{2} - 16 - 5 c^{2} + 16 c = 12$

Subtract $5 c^{2}$ from $4 c^{2}$ .

$- c^{2} - 16 + 16 c = 12$

Subtract $12$ from both sides of the equation.

$- c^{2} - 16 + 16 c - 12 = 0$

Subtract $12$ from $- 16$ .

$- c^{2} + 16 c - 28 = 0$

Factor the left side of the equation.

Factor $- 1$ out of $- c^{2} + 16 c - 28$ .

Factor $- 1$ out of $- c^{2}$ .

$- (c^{2}) + 16 c - 28 = 0$

Factor $- 1$ out of $16 c$ .

$- (c^{2}) - (- 16 c) - 28 = 0$

Rewrite $- 28$ as $- 1 (28)$ .

$- (c^{2}) - (- 16 c) - 1 \cdot 28 = 0$

Factor $- 1$ out of $- (c^{2}) - (- 16 c)$ .

$- (c^{2} - 16 c) - 1 \cdot 28 = 0$

Factor $- 1$ out of $- (c^{2} - 16 c) - 1 (28)$ .

$- (c^{2} - 16 c + 28) = 0$

Factor.

Factor $c^{2} - 16 c + 28$ using the AC method.

Consider the form $x^{2} + b x + c$ . Find a pair of integers whose product is $c$ and whose sum is $b$ . In this case, whose product is $28$ and whose sum is $- 16$ .

$- 14, - 2$

Write the factored form using these integers.

$- ((c - 14) (c - 2)) = 0$

Remove unnecessary parentheses.

$- (c - 14) (c - 2) = 0$

If any individual factor on the left side of the equation is equal to $0$ , the entire expression will be equal to $0$ .

$c - 14 = 0$

$c - 2 = 0$

Set $c - 14$ equal to $0$ and solve for $c$ .

Set $c - 14$ equal to $0$ .

$c - 14 = 0$

Add $14$ to both sides of the equation.

$c = 14$

Set $c - 2$ equal to $0$ and solve for $c$ .

Set $c - 2$ equal to $0$ .

$c - 2 = 0$

Add $2$ to both sides of the equation.

$c = 2$

The final solution is all the values that make $- (c - 14) (c - 2) = 0$ true.

$c = 14, 2$

Find All Complex Solutions (c-4)/(c-2)=(c-2)/(c+2)-1/(2-c)

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